Rename monster cube and change fire to red (#3718)

Project/Assets/ML-Agents/Examples/CubeWars/Prefabs/CubeWarArea.prefab

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 --- !u!4 &3331463254605917318 stripped
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       propertyPath: m_Name
-      value: CubeZilla
+      value: DragonCube
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Project/Assets/ML-Agents/Examples/CubeWars/Scripts/Laser.cs

     {
         laserRenderer = GetComponentInChildren<LineRenderer>();
         laserRenderer.SetWidth(width, width);
-        laserRenderer.material.SetTextureScale("_MainTex", new Vector2(0.05f, 1.0f));
+        laserRenderer.material.SetTextureScale("_MainTex", new Vector2(0.07f, 1.0f));
     }
 
     // Update is called once per frame